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US3595809A
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Lanthanum chromium ferrite catalyst
Assignee: Gulf Research and Development Co
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Filing: 1969-06-27
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Granted: 1971-07-27
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Expires: 1989-06-27
Abstract
Abstract A HYDROCARBON CONVERSION CATALYST COMPRISING LANTHANUM, CHROMIUM, IRON AND OXYGEN IN A LANTHANUM CROMIUM FERRITE PEROVSKITE-TYPE STRUCTURE.
Inventors
- 👤 William L Kehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:25
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; Y; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |